Our high-end system gets an Athlon 64 X2 4400 processor. This chip costs a good 50% more than the X2 3800 , so it's a little indulgent. However, with 1MB of L2 cache per core, the Athlon 64 X2 4400 has twice the L2 cache of the X2 3800 . The X2 4200 also runs 200MHz faster than the X2 3800 , and it might have a better chance of hitting higher overclocked speeds. Overclockers might also want to consider 939-pin dual-core Opterons, which feature 1MB of L2 cache per core and run at a lower default voltage than the X2 line.
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